{2, 3, 8, 19, 46, ...}

111

Step-by-step explanation:

Multiply the number by two and then add the number right before it.

3*2+2=8

8*2+3=19

19*2+8=46

46*2+19=111

and so on.

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.